Includes round straight duct options (CD11-4 for constant equal friction and CD11-3 for velocity limited) and flexible elbows (CD3-22 and CD3-23). Expanded Input Ranges: The allowable range for physical dimensions like height ( ), width ( ), and length (
#HVAC #ASHRAE #DuctDesign #EnergyModeling #MEPEngineering ashrae duct fitting database version. 6.00.05
The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) has been a leading authority in the HVAC industry for over a century. One of its most valuable resources is the ASHRAE Duct Fitting Database, which provides engineers, architects, and designers with a comprehensive collection of duct fitting data. The latest version, 6.00.05, is a significant update that offers improved accuracy, expanded content, and enhanced usability. Includes round straight duct options (CD11-4 for constant
Beware of “free downloads” online—they often contain corrupted files or earlier version (v4.0) with outdated coefficients. The latest version, 6
Why? Because 6.00.05 was the first version where the for each coefficient were published alongside the values. That transparency allowed engineers to run probabilistic pressure drop simulations — something unthinkable with older paper tables.
Understanding the ASHRAE Duct Fitting Database Version 6.00.05
In a recent project involving a retrofit with limited plenum height, we had to use several stacked elbows and closely spaced tees. Standard ductulators underestimated the losses. Using the stacked fitting data in v6.00.05, we calculated a pressure drop 25% higher than the standard method, allowing us to correctly size the fan curve and avoid a noise/commissioning failure later.